643283211264 has 88 divisors (see below), whose sum is σ = 1716843595008. Its totient is φ = 214145187840.

The previous prime is 643283211239. The next prime is 643283211281. The reversal of 643283211264 is 462112382346.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200209 + ... + 2475375.

Almost surely, 2^643283211264 is an apocalyptic number.

643283211264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643283211264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858421797504).

643283211264 is an abundant number, since it is smaller than the sum of its proper divisors (1073560383744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643283211264 is a wasteful number, since it uses less digits than its factorization.

643283211264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275951 (or 275933 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The spelling of 643283211264 in words is "six hundred forty-three billion, two hundred eighty-three million, two hundred eleven thousand, two hundred sixty-four".